40109969 has 4 divisors (see below), whose sum is σ = 42221040. Its totient is φ = 37998900.

The previous prime is 40109963. The next prime is 40109977. The reversal of 40109969 is 96990104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40109969 - 2²⁴ = 23332753 is a prime.

It is a super-2 number, since 2×40109969² = 3217619226361922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40109963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055507 + ... + 1055544.

It is an arithmetic number, because the mean of its divisors is an integer number (10555260).

Almost surely, 2^40109969 is an apocalyptic number.

It is an amenable number.

40109969 is a deficient number, since it is larger than the sum of its proper divisors (2111071).

40109969 is a wasteful number, since it uses less digits than its factorization.

40109969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111070.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 40109969 is about 6333.2431660248. The cubic root of 40109969 is about 342.3083098057.

The spelling of 40109969 in words is "forty million, one hundred nine thousand, nine hundred sixty-nine".